Musical Fidelity M6xi Integrated Amplifier

A Dual-Mono Integrated Amplifier Built to Drive Demanding Speakers

The M6xi is Musical Fidelity's update to the long-running M6si, keeping the same core idea: a preamplifier and two independent monoblock power amplifiers sharing a single chassis, rather than one shared amp circuit for both channels. That dual-mono architecture is a big part of why Musical Fidelity's integrated amps have a reputation for unusually strong current delivery relative to their rated power.

The M6xi is built for listeners who want a serious two-channel amplifier as the center of their system, with enough digital connectivity to also cover a TV, a computer, or a streamer, without stepping up to a full streaming amplifier.

Power and Control for Difficult Loads

The amplifier section is derived from Musical Fidelity's TITAN power amplifier platform, using a low-distortion Darlington output stage. It's rated at 220 watts per channel into 8 ohms and 320 watts into 4 ohms (continuous, 1% THD), with 45 amps of peak-to-peak current available for the split-second demands of dynamic music and difficult speaker loads.

Modern Digital Inputs on a Proven Analog Base

Where the outgoing M6si was limited to a single USB-B input, the M6xi adds a built-in DAC with USB-C (up to 24-bit/192kHz), optical TOSLINK, coaxial S/PDIF, and HDMI eARC for connecting a TV directly. Four RCA line-level inputs and a balanced XLR input round out the analog side.

A Phono Stage Built for Real Turntables

The onboard phono stage is switchable between moving-magnet (MM) and moving-coil (MC) cartridges, with 40dB of gain in MM mode and 60dB in MC mode. Musical Fidelity redesigned the circuit board and shielding for this update specifically to lower noise and distortion in the phono stage.

Built to Fit Into a Larger System

A home theater bypass input lets the M6xi function as a dedicated two-channel power amp inside a multichannel system, taking a fixed-level feed from an AV receiver. A pre-out supports bi-amping or an active subwoofer, an RS232 port allows integration with custom-install control systems, and a 5V/2A USB-A output can power an external streamer directly, without a separate wall adapter.

Is the Musical Fidelity M6xi Right for You?

• You want serious power with real current reserves. 220 watts per channel and 45A of peak-to-peak current give it authority over speakers that are hard to drive.
• You want one box for turntable, TV, and digital sources. The built-in MM/MC phono stage, HDMI eARC, and USB-C DAC cover most sources without extra boxes.
• You're building or completing a multichannel system. The home theater bypass input lets the M6xi serve as your front L/R power amp alongside an AV receiver.
• You want a straightforward, non-networked amplifier. There's no display screen, app, or built-in streaming platform; a remote and rear-panel controls handle everything.
• One honest limitation: at 18.5 kg (40.8 lbs) and roughly 17″ wide by 16″ deep, this is a substantial component; confirm your rack or shelf can support the weight and depth before ordering.

Setup, Compatibility & What's Included

The M6xi connects to speakers via standard binding posts, and to sources through its RCA, XLR, phono, USB-C, optical, coaxial, or HDMI eARC inputs. A pre-out and home theater bypass input make it straightforward to integrate into either a pure two-channel system or a home theater setup led by a separate AV receiver. Included in the box: the M6xi amplifier, a remote control, a power cable, and a printed manual. A turntable, speakers, and speaker cable are sold separately.

Key Features

Dual-Mono Amplifier Architecture
A separate preamp and two independent monoblock power amps share one chassis, contributing to the amp's strong current delivery.

TITAN-Derived Output Stage
A low-distortion Darlington output stage adapted from Musical Fidelity's flagship TITAN power amplifier platform.

Built-In DAC with HDMI eARC and USB-C
A Texas Instruments PCM5242 DAC handles USB-C, optical, coaxial, and HDMI eARC digital sources up to 24-bit/192kHz.

Switchable MM/MC Phono Stage
Redesigned circuitry and shielding support both moving-magnet and moving-coil cartridges with lower noise.

Home Theater Bypass Input
Lets the M6xi act as a dedicated two-channel power amp inside a larger multichannel system.

USB-A Power Output and RS232
A 5V/2A USB-A port can power an external streamer, and an RS232 port supports custom-install control systems.

Specifications

• Type: dual-mono integrated amplifier (preamp + 2 monoblock power amps in one chassis)
• Power output: 220W per channel @ 8Ω, 320W @ 4Ω (continuous, 1% THD, 1kHz)
• Peak power: 280W @ 8Ω, 450W @ 4Ω
• Power at 0.09% THD, 20Hz-20kHz: 210W @ 8Ω, 300W @ 4Ω
• Peak-to-peak current: 45A
• Output stage: Darlington, derived from TITAN platform
• DAC: Texas Instruments PCM5242
• Digital inputs: USB-C (24-bit/192kHz), optical TOSLINK, coaxial S/PDIF, HDMI eARC
• Analog inputs: 4x RCA line-level, 1x balanced XLR
• Phono stage: switchable MM/MC, 40dB gain (MM) / 60dB gain (MC)
• Phono SNR: >87dB A-weighted; RIAA/IEC response: ±0.4dB
• Preamp volume control: Burr-Brown stepped attenuator
• Additional outputs: variable pre-out (bi-amp/subwoofer), line-out (recorder/headphone amp)
• System integration: home theater bypass input, RS232 port, USB-A 5V/2A power output
• Control: included remote control; no display screen or app
• Chassis: rigid aluminum, extruded front/side/top panels, all-metal EMI shielding
• Dimensions (W × H × D): 440 × 125 × 400 mm (17.3″ × 4.9″ × 15.7″)
• Weight: 18.5 kg (40.8 lbs)
• Finish: Black or Silver

Awards & Expert Reviews

StereoNET awarded the M6xi a 9/10 score and an Applause Award. Reviewer David Price called it "an excellent all-round integrated amp" that "sounds really good across all sources, has loads of power and is refreshingly easy to use and set up," adding that it is "keenly priced, built very well" for its category.

Frequently Asked Questions

Does the M6xi include a phono stage?

Yes. It has a built-in phono stage switchable between moving-magnet (MM) and moving-coil (MC) cartridges, so most turntables can connect directly without a separate phono preamp.

Can I use the M6xi with my TV?

Yes. The M6xi has an HDMI eARC input, so you can connect it to a compatible TV and use it to power your TV's sound through your speakers.

How is the M6xi different from the outgoing M6si?

The core analog amplifier design carries over, but the M6xi adds significantly more digital connectivity: USB-C (versus USB-B on the M6si), optical, coaxial, and HDMI eARC inputs, plus an RS232 port and a USB-A power output that the M6si did not have.

Can the M6xi work as part of a home theater system?

Yes. Its home theater bypass input accepts a fixed-level feed from an AV receiver's front L/R pre-outs, letting the M6xi serve as a dedicated two-channel power amp within a larger multichannel setup.

Does it stream music or have an app?

No. The M6xi does not include built-in streaming or an app; it's a traditional integrated amplifier with digital inputs. If you want network streaming, you'll need a separate streamer connected to one of its digital inputs.

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